Part Number: CR43TS
AC Delco CR43TS Spark Plug
The AC Delco CR43TS Spark Plug is a trusted OEM-quality ignition component designed to deliver reliable performance in GM-based marine engines. Engineered for consistent spark generation and efficient combustion, this spark plug helps maintain smooth engine operation, dependable starts, strong throttle response, and optimal fuel economy throughout the boating season.
Marine engines operate under demanding conditions where heat, moisture, and continuous load can accelerate wear on ignition components. Replacing spark plugs at recommended service intervals is one of the most effective ways to maintain peak engine performance and prevent common issues such as hard starting, rough idle, misfires, and power loss.
Built to AC Delco's exacting standards, the CR43TS offers dependable ignition performance and durability in both freshwater and saltwater environments. Whether you're performing routine maintenance or a complete tune-up, this spark plug helps keep your engine running smoothly and efficiently.
Common Engine Applications
The AC Delco CR43TS spark plug is commonly used in a variety of GM-based marine engines, including:
- Indmar Monsoon 310
- Indmar Monsoon 320
- Indmar Monsoon 325
- Indmar Assault 310
- Indmar Assault 325
- Indmar 5.7L MPI
- PCM Excalibur 330
- PCM GT-40 replacement applications
- MerCruiser 5.0L MPI
- MerCruiser 5.7L MPI
- MerCruiser 350 MAG
- Crusader 5.7L MPI
- Volvo Penta 5.7Gi
Common Boat Fitments
These engines are frequently found in popular inboard ski, wake, and surf boats, including:
Supra
- Supra Launch 20SSV
- Supra Launch 21V
- Supra 22SSV
- Supra Sunsport 22V
- Supra Comp
Moomba
- Moomba Mobius LSV
- Moomba Mobius XLV
- Moomba Outback
- Moomba Mojo
- Moomba Mobius LS
Malibu
- Malibu Wakesetter VLX
- Malibu Wakesetter 23 LSV
- Malibu Response LX
- Malibu Sunsetter LXi
MasterCraft
- MasterCraft X-2
- MasterCraft X-15
- MasterCraft X-Star
- MasterCraft ProStar 197
- MasterCraft MariStar 225
Nautique
- Ski Nautique 196
- Super Air Nautique 210
- Super Air Nautique 220
- Nautique 216
Centurion
- Centurion Elite V
- Centurion Avalanche
- Centurion Air Warrior
Features
- Genuine AC Delco CR43TS spark plug
- OEM-quality design for marine applications
- Provides consistent spark and reliable combustion
- Helps improve starting performance and throttle response
- Supports smooth idle and efficient fuel usage
- Resistant to fouling under marine operating conditions
- Ideal for routine maintenance and annual tune-ups
Why Replace Spark Plugs?
As spark plugs wear, ignition efficiency can decrease, resulting in reduced performance and increased fuel consumption. Installing fresh spark plugs helps maintain engine power, improve reliability, and keep your boat performing at its best.
Whether you're servicing a Supra, Moomba, Malibu, MasterCraft, Nautique, or Centurion powered by a GM-based marine engine, the AC Delco CR43TS Spark Plug provides the dependable ignition performance and durability needed for countless hours on the water.